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Table 4 Results of Insemination

From: The continuum of ovarian response leading to BIRTH, a real world study of ART in Spain

  All women
(n = 642)
Poor
Responders
(n = 58)
Suboptimal responders
(n = 240)
Normal
Responders
(n = 344)
Number of fertilized oocytes mean (± SD)   2.3
(1.8)
4.5
(3.6)
6.8
(4.8)
Fertilization rate (%)
(number of fertilized oocytes / number of inseminated or microinjected MII oocytes)
  71.7% 68.4% 72.4%
Number of embryos transferred
 1 n (%) 120 (33.1%) 12 (36.4%) 49 (36.3%) 59 (30.3%)
 2 n (%) 239 (65.8%) 21 (63.6%) 83 (61.5%) 135 (69.2%)
 3 n (%) 3 (0.85) 0 (0%) 3 (2.2%) 0 (0%)
  1. Note: Means & percentages are based on the number of patients with non-missing data